Fig. 4: 1H NMR of [Eu2L13]/[Eu4L16].
a 1H NMR of crude mixture containing both of [Eu2L13] (blue) and [Eu4L16] (magenta) in a ratio of 96:4. b 1H NMR showing pure [Eu2L13] by dissolving crude mixture after 3 days. c 1H NMR of pure [Eu4L16] that was done simultaneously after dissolution of [Eu4L16].
